Subgrade-scraper.



E. G. CARR.

SUBGRADE SCRAPER. APPLICATION FILED MAN. 7, Hill. RENEWED NOV. [5.191].

Patontvd J unv 11, 1918 2 SHtETS-SHEET I WITNESSES 7%; "Maw, M

E. e. CARR.

SUBGRADE SCRAPER. APPLICATION FI LED MAR 7 I917. RENEWED NOV. I5. I917.

1,268, 925,, Patented J une 11, 1918.

2 SHEETSSHEET 2- ATTOR/VE i s SUBGRADE-SCRAPER nnwnnn enoaen CARR, or onnnnrm, CALIFORNIA.

Specification of I etters Patent. Patented June 11, 191$.

Application filed March 7, 1917, Serial No. 153,044. Renewed November 15, 1917. Serial No. 202,257.

To all whom it mayfioncernk Be itknown that I, EDWARD G. CARR, a citizen of .the United States, and a resident of Oakland, in the county of Alameda and State of California, have invented certain newand useful Improvements in Subgrade- Scrapers, of which the following is a specification,

. My invention is an improvement in subgrade scrapers, and has for its object to pro-' vide mechanism of the character-specified able outline, and shafts 2 and 3 are journaled' adapted to run upon the header boards or forms and to cut away the surface of the grade, and wherein the cutting blades may be adjusted to any desired depth, and wherein means is provided for permittin the scraper to be turned without the necessity of removing it from the roadway.

In the drawings:

Figure 1 is a top plan view of the improved scraper, Fig. 2 is a rear view,

Fi 3 is asection on the line 3-3 of Fig. 1, loo ing in the direction of the arrows a jacent to the line, i

Fig. 4 is a partial rear view showing the method of aghusting the wheels,

Fig. 5 is a section on the line-55 of Fig. 2, looking in the direction of the arrows ad'- jacent to the line, and

Fig. 6 is a diagrammatic View showing a modified arrangement of the blades. p In the embodiment of the invention shown in Fi 1 to 5, the scraper comprises a suitfiame 1 of substantially rectangular longitudinally of the frame at the opposite sides thereof, and out-side of the frame. Theseshafts are journaled in bearings 4 on adjusting plates 5, which are supported by,

the frame, and wheels 6 are journaledon the ends of the shaft. These wheels are adapted to run upon the header boards or form boards 6 for the roadway, and the adjusting plates are adapted to be moved upward or downward in order to move the shafts 2 and 3 with respect to the frame.

Theseadjust-ing plates 5 are supported at their'inner ends by links 7 each link being pivoted at one end to the frame and at the other to the plate, and the said plates are of an le material, as shown. The outer end of eac plate is connected by a link 8, with an angular lug 9 on a-lever 10 pivoted on the frame, and having a transverse pin 11 which is adapted to engage with one of a series of 'openin s in a quadrant 12 secured to the supported from the frame depending below the same in inclined position, the blades 13 and 15 being arrangedm pairs.

As shown in Fi 1, the blades 13 are at the center of the i rame, being arranged in inverted'V-shape. The blades 14 are inclined inwardly from front to rear, and the 1,

rear end of each blade 14: is spaced apart from the rear end of the adjacent blade 13. Each pair of blades 15 is arranged in in- Xvertcd V-shape in front of the space hetween-the adjacent pair ofblades 13 and 1d. The blades 13 are connected with a suitable supporting frame 16 of angle material, and each blade 14: is connected to a similar supporting frame 17, the frames 16 and 1? being connected with themain frame 1.

Each pair of'blade's 15 is connected with the supporting frame 18, the said frames 16, 17 and 18 being of angle material, as shown more particularly in Fig. 2, each frame having a portion secured to the main frame and the other portion depending therefrom for the detachment of the blade.

Suitable draft apparatus, indicated 19,

is connected with the front of the frame by means of cyebolts 20, the said draft apparatus being chains, in the present instance, which may be attached-to a suitable motor. A shoe 21 of circular for-misarranged at the center of the frame, the said shoe having a step hearing or hub 22, into which engages the lower end of a shaft 23. This shaft is mounted for vertical movement in a bearing sleeve 2%. secured to the main frame, and it is moved vertically by means of elbow levers 25. Each of these levers consists of a long arm and a short arm, the short arm be ing pivoted between the adjacent ends of a pair of channel bars 26. The channel bars are arranged with their channels outward and in spaced relation, and a bushing 27 is arranged on the shaft between the channel bars, the said bushing being secured to the channel bars as shown in Figs. 2 and 3.

A stop collar 28 is held on the shaft above the bushing, by means of a set screw 29, and a link 30.connects each lever 25 with the frame. These links are pivoted at their llt boards 6, and with the shafts 2 and 3 prop- While when the levers are moved into the dotted line position of said figure, the shoe will "be lowered.

Itwill be evident that when the device is in operation with the Wheels 6 on the header erly adjusted, the scraper blades 13, 14 and -15 will remove the top: layer ofsoil and will throw dt into two long heaps or windrows.

;' The device may be admstedto out out any desired depth. Instead of arranging the blades in the manner shown in Fig. 1, they may be arranged as shown in Fig. 6, where in a central pair of blades 31 is provided arranged in inverted V-shape and lateral blades 32, the blades 31 and 32 being so arranged that their rear ends Will lap ,to completely loosen the top layer of soil. By means of the shoe, the scraper may be turned or reversed Without removing it from the roadway. When the levers 25. are swung in the proper direction, the shoe will be lowered into contact with the ground, and the further movement of the levers in the same direction Will lift the frame, which being supported by the shoe and pivoted to the shaft 23,.may be swung about end for end and then lowered into place.

It will be noticed that the bushing?! has on ositel extendin intles. which are I upper ends to the levers at the junctioir of;

ends of the frame jonrnaled in the" channel bars. 'lhus the 1. A scraper of the character specified comprising a frame, scrapers carried by the l:ran1e,'wheels for supportingthe trams and means at the center of the frame tor raising the frame, the frame being rotatable on i the said means, and the said means compris' ing a shoe adapted to engage the ground, ashaflt journaled on theii'rame to which the lower end of the shoe is-connected-,'a bearing frame through which the shaft extends, said. shaft having fixed collars above and below the frame, elbow levers pivoted to the and links connecting the said levers with the main frame; 2; A scraper of the character specified comprising a th-ame,-sorapers carried by the frame, shafts extending longitudinally of the frame at oppositeisides thereof and at the outer sides of the frame, Wheels on the ends of the shafts, a connection between each shaft and the frame for permitting the shaft to be raised or lowered with respect to the frame and to be held inadjusted position, andmeans at the center-ofthe'freme for raising the frame,- the frame' beingrotatnble on the said means. EDWARD GEORGE CAR-R. .lVithcssed bya CHAS. Rnmrnniv, J D. LACKMAN. 

